(11) باب فَضْلِ الْعَمَلِ فِي أَيَّامِ التَّشْرِيقِ
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "No good deeds done on other days are superior to those done on these (first ten days of Dhul Hijja)." Then some companions of the Prophet (ﷺ) said, "Not even Jihad?" He replied, "Not even Jihad, except that of a man who does it by putting himself and his property in danger (for Allah's sake) and does not return with any of those things."
Reference: Sahih al-Bukhari 969
In-book reference: Book 13, Hadith 18
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 15, Hadith 86